请教高手两道英语选择题
16.He_____,butIdivedinandrescuedhim.A.wasdrowningB.haddrownedC.drownedD.hasbeendrowne...
16.He_____,but I dived in and rescued him.
A.was drowning B.had drowned C.drowned D.has been drowned
为什么选A不选D?求解释
18.today more and more people are becomingconcerned about the way nature________.
A.ruins B.is ruined C.is being ruined D.is ruining
为什么选C不选B，求解释 展开
A.was drowning B.had drowned C.drowned D.has been drowned
为什么选A不选D?求解释
18.today more and more people are becomingconcerned about the way nature________.
A.ruins B.is ruined C.is being ruined D.is ruining
为什么选C不选B，求解释 展开
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